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January 2015

Continued Building Stabilization activities, including completion of removal of utilities in Building D and beginning removal of remaining utilities in Building C, completion of demolition of non-structural concrete walls beneath the C-mezzanine and tool room areas, completion of vacuum cyclone systems removal from Building E Mechanical mezzanine.

Completed asbestos abatement from Building A and commenced asbestos abatement in Building B.

Completed all work under the High Hazard Work Plan.

Began solidifcation of low-level vacuum bags and sonodyne waste.

Began identification and characterization of building materials in Buildings C and D.

December 2014

Received additional Agency comments on the Phase 2 Construction Submittal on 15DEC.

Continued Building Stabilization activities, including utility, crane and HVAC removal in Buildings C and D, completed demolition of non-structural concrete walls in the north end of Building C-Mezzanine and the former machine shop, completed demolition of Building D and E mezzanine office partitions and installed necessary guardrails for fall protection, and removal of the floor from the Building B elevator and conduction of a radiological survey at the base of the elevator shaft.

Installed an additional sound barrier adjacent to the northern air monitoring station in response to a follow-up noise complaint from a neighboring resident.

Continued High Hazard Work Plan activities, including neutralization of impacted materials generated from HF Area work and completed removal of all tanks, ductwork, pumps, and piping associated with the HF processing equipment.

Conducted onsite tours of the buildings for prospective demolition contractors responding to the Phase 3 Request for Proposal.

Coordinated with the Concord Fire Department as to the cause of the alarms due to a fault in the Building C sprinkler system flow sensor switch, unrelated to NTCRA activities. The switch may be reinstalled once a replacement is located.

November 2014

Continued Building Stabilization activities, including utility removal in Buildings C and D, commenced removal of interior corrugated steel walls in the north end of Building D, completed removal of plaster walls and ceilings in Buildings A and B to provide easier access for asbestos abatement, completed removal of acid-tray brackets and the remaining utilities in the vicinity of the acid tray brackets, completed demolition of non-structural concrete walls in the southern portion of Building D near the former pickling and foundry areas, completed demolition of Building D mezzanine office partitions and began demolition of Building E office partitions, installed a sound barrier adjacent to the east air monitoring station in response to a noise complaint from a neighboring resident.

Continued High Hazard Work including neutralization of waste generated from Acid Recycling Area and Acid feed lines, began removal and neutralization of equipment from the HF area. Also began removal and neutralization of equipment from the HF area and removed the calciner equipment tanks V-002, V-606, V-608, and V-609.

Continued preparation of Phase 3 Construction Submittal.

Submitted Response to Comments and Revised Interior Asbestos Abatement Work Plan on 24 NOV and received EPA’s conditional approval on 26NOV.

Shipped 32 intermodal containers to US Ecology, Idaho, for land disposal, which included one shipment of lead containing debris. Also loaded and shipped approximately 9,000 gallons of non-hazardous aqueous fluids to US Ecology Idaho.

Continued work in accordance with the High Hazard Work Plan including: equipment removal of the acid recycling area, continued neutralization of waste generated from acid recycling area and acid feed lines, and completed removal of the acid feed lines. Acid lines in the HF area were left to be addressed in the next phase of work.

Completed solidification of low activity Sonodyne waste.

Completed contamination reduction efforts in D-103.

Completed exterior survey to identify property boundaries on the southern portion of the site.

Continued preparation of Phase 3 Construction Submittal.

September 2014

A CREW/2229 Main Street Committee meeting was held on September 17th, 2014.

Continued Building Stabilization activities, including ductwork, crane and utility removal in Buildings C and D. Completed ventilation and utility removal around the locker rooms in Building E. Completed demolition work in Building D, Room D-118, including the removal of offices, walkways, and the rotating electrode plasma work area. Completed demolition in Building D, Room D-116. Completed Freon recovery from air conditioning and refrigeration units on rooftops.

Completed the preliminary air sampling to establish baseline activity in accordance with the Air Monitoring Plan.

Continued work in accordance with the High Hazard Work Plan. The work in the Acid Pickling Area is completed and work commenced this period in the Acid Recycling Area.

Continued preparation of the Phase 3 Construction Submittal.

Completed the fence installation in the southeast portion of the property to isolate areas where discrete pieces of depleted uranium metal were located during the Depleted Uranium Metal Exterior Site Characterization Survey.

Began investigating potential temporary cap materials and vendors for use during building demolition.

Received EPA comments on Perimeter Air Monitoring System on 11 SEP 14 and responded to those comments on 15 SEP 14. Received EPA approval on 17 SEP 14.

Received EPA comments on Asbestos Abatement Plan on 22 SEP 14.

August 2014

Continued heat stress monitoring to ensure workers are maintaining safe practices, particularly the High-Hazard work crews.

Continued Building Stabilization activities, including rooftop system investigations to gather information on equipment dimensions, contamination, and accessibility; continued removal of ductwork and utilities in Buildings D and E; completed clearing and demolition of room E-131 in Building E; and organized and relocated DU materials to former electrical room in Building E for storage.

Completed scan of southeast fence line in order to identify areas to be fenced in support of the Exterior Depleted Uranium Exterior Survey Work Plan.

Commenced work within the Pickling Area in accordance with the High Hazard Work Plan. Pickling tanks, air scrubber, and most of the associated duct work have been removed and neutralized.

Completed installation of the air monitoring stations and equipment. The meteorological station has been calibrated. Installed mufflers on air monitoring stations to reduce exhaust noise. Commenced 30-day background sampling to establish baseline activity in accordance with the Air Monitoring Plan.

Completed the latest shipping campaign on 6AUG14 of 32 intermodal containers of off-site disposal at US Ecology in Grand View, Idaho.

July 2014

Implemented heat stress monitoring to protect workers due to high ambient temperatures in the buildings.

Building Stabilization activities continued, including solidification of DU vacuum bag contents and neodymium powders, investigations of rooftop systems, removal of duct work and utilities in Building E, completion of clearing electrical room in Building E, installation of fences around perimeters of air samplers and meteorological tower, and construction of access road to the back side of the boiler room for future asbestos removal operations.

June 2014

Conducted site tour for Agencies and Concord Fire Department on 2JUN 2014.

Met with Concord Fire Department to discuss High Hazard Work Plan and techniques and safety precautions necessary for first responders in the event of an incident involving hydrofluoric acid.

Concord Light investigated a report of downed power line during the installation of the air samplers on 23JUN 2014. All electrical lines were restored following installation of samplers.

Building Stabilization activities continued, including solidification of DU vacuum bag contents and neodymium powders, rooftop systems investigation, vacuuming of underground diesel storage tanks, dismantling and removal of waster water tanks in Building E waste process area, removal of clean-air handling units in Building E Mechanical Room, filtering of waste oils to remove sludge and tranfer into clean drums in a free-release portion of building preparation for disposal and dismantling and removal of pressure washing equipment from Building E.

Submitted response to comments on the Notification of High Hazard Materials Removal and Demolition Contractor on 9JUN2014 and received verbal approval on 16 JUN 2014.

Removed remaining gas cylinders from site on 10JUN 2014 for off-site disposal at US Ecology.

May 2014

Performed necessary community coordination for upcoming High Hazard work: Met with Concord Fire Department to discuss the High Hazard Work Plan and the potential for a hydrofluoric (HF) acid accident; Contacted the Department of Emergency Medicine and Emerson Hospital to evaluate what type of HF acid medical supplies would need to be purchased for the Emergency Room. Also began preparation of contamination reduction zones and equipment for High Hazard work.

Continued Building Stabilization activities, including removal of utilities throughout Buildings A and B, completed capping of pits and trenches in Buildings C and D with the exception of the pit containing the 1,400 Ton Press, solidification of DU vacuum bag contents, commenced rooftop system investigation to gather information on equipment dimensions and accessibility, completed sorting and packaging of PCB and non-PCB light ballasts (all contained in vermiculite lined drums now), and completed DU exterior survey for areas not plotted properly in original survey.

Poured concrete foundations for placement of air sampling units and meteorological tower. Erected the met tower.

Completed packaging and shipment of lab-pack chemicals. Emptied underground storage tanks of all remaining fuel oil and vacuumed out the associated feed lines of residual fuel. Waste oil was disposed off-site by incineration.

April 2014

Continued Building Stabilization activities, including removal of utilities throughout Buildings A and B, completed removal of light fixtures and ballasts in Building D, preformed a building-wide cleanup campaign to remove dust and debris generated during previous loading activities, Completed survey of interior pits and trenches prior to starting filling operations, completed filling of pits in Building D, former foundry, and lateral trenches in Building C with gravel and began capping pits and trenches with concrete, inspected the well in Building D and determined depth of about 30 feet and radiological activity between 400k-500k cpm. In addition, completed onsite inspection and identification of non-structural masonry walls throughout Buildings A and B, continued solidification of materials from vacuum bags, completed separation and packaging of lab-pack chemicals, completed depleted uranium exterior survey of catch basins and drains and installed rooftop walkways across Buildings A, B and C for safe access for building maintenance and rooftop system investigations.

Submitted a notification of High Hazard Materials Removal and Demolition letter to EPA on 8 Apr 2014.

Shipped 8 intermodal containters off-site on 15-16 Apr 2014.

March 2014

Continued Building Stabilization activities, including completing removal of remaining combustible walls in Buildings A and B laboratories, continued removal of utilities throughout Building B and lab areas of Building A, dismantled and resized Starmet equipment for disposal (scissor lifts, aerial boom lift and fork lift). Commenced surveying the pits, cracks and penetrations of foundation slabs throughout the buildings. Transferred and containerized acids from the HF area day tanks. Completed draining of lead acid batteries to segregate electrolytes from universal waste.

Shipped 32 intermodal containers off site for disposal during the weeks of 10 MAR and 17 MAR 2014.

February 2014

Continued Building Stabilization activities, including snow removal in response to numerous winter weather storms, completion of combustible wall removal in Buildings A except for laboratories, initiated removal of remaining combustible walls in labs, completed removal of piping/conduit from Building C and began removal in Building B, completed removal of vacuum lines in Buildings B and most of E, completed cleaning and removal of lab benches and fume hoods from Building A labs.

Completed response to DU fire incident: filled in pits in HF area, segregated and neutralized co-mingled waste piles and supersacks, transferred acids from day tanks to portable poly containers, and neutralized HF area and equipment.

Concord Fire Department responded to a fire alarm on 1Feb14. Alarm was associated with a sensitive low-flow sensor in Building C, which was corrected by resetting the system. It was determined that the sensor trips with water supply pressure variations in the Concord system and the alarm may continue to be triggered.

January 2014

Continued Building Stabilization activities, including completing assembly of rooftop walkways, completing processing and sizing of the crucible router in Building D, continued removal of piping/conduit from Buildings C and D, completed the removal of combustible walls in Building B and initiated removal of combustible walls in Building A, and completed removal of vacuum lines in Buildings A, C, and D and began removal of lines in Buildings B and E.

A small depleted uranium fire occurred during activities related to the High Hazard Materials Removal and Demolition work on 16 Jan 2014. Submitted a letter report to the Agencies on 31 Jan 2014 documenting the event and response.

Received Agency approval on 6 Jan 2014 for Filling and Capping of Slab Penetrations letter request.

December 2013

Building stabilization activities continued, including processing and sizing disassembled equipment; disposal of Bar Straightener from Building D; removal of lights and ballasts, piping and conduit in Buildings C and D; continued encapsulation of metal powders and shavings; completed cleaning and disassembling of “skull furnace” in Building D; commenced cleaning and disassembling of crucible router in Building D;

Submitted response to comments and revised High Hazard Materials Removal and Demolition Plan to Agencies on 2DEC13; received Agency approval on 2 DEC 13. Commenced work pursuant to the High Hazard Work Materials Removal and Demolition Plan following approval.

Continued the Depleted Uranium Metal Exterior Site Characterization Survey.

Continued packaging and loading of intermodal containers. Sixteen containers were shipped during the week of 9DEC13. Total shipments by year-end were 154 (152 Containers and 2 Tankers) consisting of 2,956,760 pounds.

November 2013

Received Agency comments on High Hazard Work Materials Removal and Demolition Plan on November 25, 2013.

Submitted letter request for Filling and Capping of Slab Penetrations on November 12, 2013; received Agency comments on November 25, 2013.

Transported 9,205 gallons of liquid to US Ecology from the Tank House activities on November 22, 2013.

Concord Public Works responded and repaired a water leak within Pump House #1 that caused potable water to migrate to Route 62 (North Main Street) on November 25, 2013.

Continued packaging and loading of intermodal containers.

Continued Building Stabilization activities, including demolition of debris and equipment in Buildings C, D, and E; removal of lights and ballasts in Buildings C and D; completion of removal of debris and equipment from trenches in Buildings C and D; commenced encapsulation of metal powders and shavings.

Removed approximately 450 gallons of sludge from the North and South tanks in the Tank House and transferred the sludge to drums in preparation for encapsulation. Commenced encapsulation of sludge but halted activities on November 12, 2013 due to freezing conditions with the Tank House. Activities will resume upon installation of a temporary heater.

Continued implementation of Depleted Uranium Metal Exterior Site Characterization Survey.

Disassembled four oversized Okuma units in Building D. Disassembled and removed sludges/yellow cake from furnaces, ovens, Building B Band Saw and oven base found in Butler B-3. Removed remaining REP machine base and utilities of eastern wall of Building C. Removed all Gantry cranes from former machine shop. Processed and sized for disposal the bar straightener in Building D.

October 2013

Received Agency approval on the Tank House Work Plan on October 1, 2013. Work commenced under the plan, including draining of the Building E waste water tanks and Tank House Tanks. Approximately 5,650 gallons were transferred to the frac-tank.

Continued Transportation and Disposal off site through October 4, 2013. Total shipped through October was 136 containers with 2,483,460 pounds (1,241 tons). Off-site shipment and disposal will resume in December 2013.

Continued Building Stabilization activities, including demolition of debris and equipment in Buildings C, D, and E; processing of Butler B-3 debris and materials; removal of vacuum lines in Building D; removal of lights and ballasts in Buildings C and D; completion of metal powders and shavings screening with XRF; removal of combustible walls in Building D and C; initiated removal of debris and equipment from trenches in Buildings C and D.

September 2013

Submitted the High Hazard Work Plan for Agency review on September 5, 2013.

Provided responses to comments on the Tank House Work Plan on September 23 and 30, 2013.

Received Agency verbal approval to proceed on the Metals Solidification SOP on September 16, 2013.

Received Agency approval on the Depleted Uranium Metal Exterior Site Characterization Survey Plan on September 25, 2013.

Submitted the Phase 2 Construction Report to the Agencies on September 27, 2013.

Continued packaging and loading of intermodal containers for off-site waste shipment.Completed the screening of metal powders and shavings with the XRF.

Continued demolition of debris and equipment in Building C, D, and E.

Commenced processing of Butler B-3 debris and materials in preparation of transportation and disposal.

Continued Building Stabilization activities: Commenced removal of vacuum lines and process duct work from machine shop and Building C Mezzanine. Commenced removal of vacuum lines in Building D. Removed QC office in Building E and removed the piping and conduit from the foundry areas. Also initiated light and ballast removal in Buildings C and D along with removal of the electrical switch gear from the back courtyard.

August 2013

Continued transportation and disposal of intermodal containers from 6AUG13 through 15AUG 13 with a total amount of waste shipped off-site of 2, 210, 560 pounds (1,105.28 tons) to date.

Identified discrete pieces of depleted uranium (DU) metal in the upper two inches of soil covered by vegetation outside the buildings near the former employee entrance during routine radiological monitoring on 3AUG13. Submitted a plan for a DU metal site characterization survey on 27AUG13 to evaluate the soil, asphalt and concrete paved areas around the site not identified for remediation in the Feasibility Study.

Continued Building Stabilization activities including disassembling and demolishing equipment in Building C and D foundry areas and partial wall demotion of non-structural combustible walls in Building C. Also moved and staged all debris and materials in Butler Building B-3 into Building D for processing prior to transportation and disposal.

July 2013

Continued Building Stabilization activities, including packaging and loading of intermodal containers, removal of oils and fluids from machinery, demolition of debris and equipment in Buildings C, D, and E to assemble higher activity packages to screen with the Radionuclide Detector (RID) unit.

Received Agency comments on 17JUL13 on the Tank House Plan and Standard Operating Procedure for Stabilization of Metal Powders and Turnings identified in the Phase 1 Construction Submittal.

Paused transportation and disposal of intermodal containers from 12JUL13 until 5AUG13 to allow work crews to stockpile additional waste streams for shipment.

Through 31JUL13, one hundred and four 32-yard intermodal containers were shipped from the Site with a total weight of 1,797,680 pounds (898.84 tons).

June 2013

Held Site walk on 24JUN13 with Agencies, Concord Fire Department, Public Groups, de maximis, and representatives of Respondents to review on-going work activities.

Continued Building Stabilization activities, including packaging and loading of intermodal containers, removal of oils and fluids from machinery, demolition of debris and equipment in Buildings C, D, and E, wall removal between D-116 and 117 for efficient loading, and consolidation of usable chemicals and machine oils.

Submitted revised USEI Transportation Plan on 13JUN13.

Submitted the Tank House Plan and Standard Operating Procedure for Stabilization of Metal Powders and Turnings identified in the Phase 1 Construction Submittal to the Agencies on 19JUN13.

Completed shipment of eighty 32-yard intermodal containers, total weight of approximately 681 tons, for off-site disposal through June 31, 2013.

May 2013

Commenced transportation on May 6, 2013, of intermodal containers to US Ecology Inc. for disposal.

Waste total shipped for the month of May included forty-eight intermodal containers and 826,080 lbs.

Continued disassembling and packaging of accessible equipment in Buildings C, D, and E.

Completed paving activities as part of the Site Management and Security Plan, Addendum #1.

April 2013

Received eight intermodal containers and commenced loading in preparation for shipping in May.

Continued building stabilization activities, including commencement of oil and fluid removal from machinery, packing of loose debris in Buildings C, D, and E, disassembly of equipment in Building C and E, and removal of remaining equipment and conduit on wall in Building D, room D117.

Continued Site Management and Security Plan Addendum 1 Activities, including repurposing the RI/FS trailer for scale house, relocation of the fence along northwest corner of property around Truck scale, completed electrical installation in scale house, removed and relocated light poles, completed regrading of disturbed areas in preparation for paving, and provided improvements in parking areas for better truck traffic flow.

Continued Health and Safety activities, including relocation of the contamination reduction zone in Building C.

March 2013

Received EPA approval of the Phase 1 Construction Submittal on March 27, 2013.

Removal of northern section of partition wall in Building D, which included removal of the pre-fabricated hallway, the fire suppression system, and the cinder block wall. In addition, relocated the fire alarm conduit and re-energized the garage door motor. Constructed a temporary wall for a contamination reduction zone (CRZ).

Completed grading around southern portion of buildings. Placed top soil stockpile immediately south of Butler Building B-2.

Packaged loose debris in Building E. Also disassembled equipment in Building E to assemble higher activity packages to screen with the Radionuclide Detector unit.

February 2013

Responded to Agency comments on the Phase 1 Construction Submittal comments on February 8, 2013.

Began excavation for the truck scale foundation.

Performed snow removal for February 10, 2013 snow event of 24 inches. Work crews on-site over the subsequent weekend to maintain access roads.

January 2013

Received Agency comments on the response to comments on the Phase 1 Construction and revised Phase 1 Construction submittals.

December 2012

EPA approves Addendum No. 1 to Site Management and Security Plan for the NMI NTCRA on December 20, 2012.

Continued Building Stabilization activities: installed temporary propane heater in tank house, had Concord Fire Department on site to perform Fire Suppression Loop Pressure Test, and cleared snow following December 17, 2012 snow event.

November 2012

Update of NTCRA activities was provided to the Agencies and Concord Fire Department on November 7, 2012.

September 2012

On September 10, 2012 de maximis received conditional approval of the Removal Action Work Plans and Cylinder Removal plan pending compliance with final EPA comments.

August 2012

On August 27, 2012, de maximis participated in a Site walk with Agencies and Concord Fire Department.

de maximis removed Building A HVAC Blower motor unit and patched hole in roof above south stairway on August 15, 2012.

Response to Comments, Revised Documents and redlined August 13, 2012.

de maximis submitted the Site Management & Security Plan Addendum #1 which summarizes exterior Site improvements for NTCRA Activities on August 14, 2012.

Building Stabilization activities performed. Materials were processed and packaged in accordance with the Packaging of Office Contents & Combustible Materials Procedures in the following areas: 1). Building A First Floor- Completed. 2). Building B First Floor- Completed. 3). Building E Office Mezzanine- Completed.

July 2012

de maximis received additional comments from the Agencies on Removal Action Work Plan (RAWP) and attachments on July 30, 2012.

de maximis submitted the Phase I Construction Submittal on July 27, 2012.

de maximis submitted Response to Comments (RTC) on Removal Action Work Plan (RAWP) and attachments on July 2, 2012.

Materials were processed and packaged in accordance with the Packaging of Office Contents & Combustible Materials Procedures in the following areas: 1). Building A First Floor- In Progress. 2). Building A Second Floor Office Areas- Completed during July 2012. 3). Building B First Floor- In progress. 4). Building B Second Floor Office Areas- Completed during July 2012. 5). Building C Mezzanine- Completed during July 2012.

May 2012

On May 8, concord Light terminated existing power service to the property/buildings. EPA provides approval of the Electrical Termination Plan and Natural Gas Piping Purge Plan.

April 2012

EPA provides comments on the NTCRA Work Plans. de maximis completed installation of Temporary Power Service.

March 2012

de maximis starts preparation of “Construction Submittals” the detailed work plans that will address specifically how building contents will be removed for off-site

February 2012

de maximis continues inventory of building contents and conducts structural analysis of building roofs.

January 2012

NTCRA Work Plans submitted on January 18. de maximis continues to implement measures to reduce risk, and starts comprehensive inventory of building contents.

December 2011

EPA approves Interim NTCRA Work Plans on December 19. de maximis continues measures to reduce risk and implements temporary heating of buildings to maintain fire sprinklers and minimize snow load.

November 2011

Starmet abandons site on November 2, de maximis takes over responsibility for site security and maintenance. Interim NTCRA Work Plans submitted on November 5. de maximis implements measures to secure buildings and reduce risk. MADPH-RCP terminates Starmet’s licenses to possess radioactive materials on November 8.

September 2011

NTCRA Trust funded. Respondents name de maximis, inc. as General Contractor for NTCRA work. de maximis, inc. starts NTCRA planning and identifies subcontractors to assist with NTCRA work.

August 2011

Administrative Settlement Agreement and Order on Consent and appendices (together, the Settlement Agreement) for Non-Time-Critical Removal Action (NTCRA) became effective August 9. Respondents to Settlement Agreement name Bruce Thompson as Project Coordinator for NTCRA work.

May 2008

Proposed Plan Public Meeting for “Engineering Evaluation and Cost Analysis (EE/CA) Disposition of Structures and Contents”.

July 2007

On July 2007:Revised Draft “Engineering Evaluation and Cost Analysis (EE/CA) Disposition of Structures and Contents”.

Spring 2007

EPA’s National Remedy Review Board reviewed the EE/CA’s preliminary options and costs for the performance of a Non-Time Critical Removal Action (NTCRA) and provided comments to EPA Region.

October 2006

Submitted Draft Engineering Evaluation and Cost Analysis (EE/CA) for the disposition of site structures and building contents for agency review.

June 2006

EPA issued Notice to Proceed for an EE/CA for the site buildings and contents.